Troubleshooting — Samastipur

Refrigerator Trips the MCB in Samastipur — Causes & Fix

July 2026 Repair Guru SPJ 5 min read Samastipur, Bihar

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A fridge that trips your home's MCB (or a fuse) every time it tries to start is drawing far more current than it should, usually when the compressor tries to kick in. This isn't something to keep resetting repeatedly — it can point to a genuine electrical fault worth fixing promptly.

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Failing Compressor Windings

Over time, internal compressor windings can develop a partial short, causing a current surge on startup that's enough to trip a protective MCB.

Signs: Trips specifically at the moment the compressor tries to start (a click, then trip).

Rs 3,500 - 8,500 (compressor)

Faulty Relay or Overload Protector

A relay or overload protector malfunctioning can send incorrect current to the compressor circuit, tripping the MCB even though the compressor itself is healthy.

Signs: Trips inconsistently, sometimes starting fine and sometimes not.

Rs 300 - 600

Damaged Internal Wiring

Frayed or damaged wiring inside the fridge, sometimes from rodent damage or old age, can cause a short circuit that trips the MCB immediately on power-up.

Signs: Trips instantly on plugging in, even before the compressor engages.

Rs 400 - 900

Weak Household MCB (Not the Fridge's Fault)

Occasionally, the MCB itself is old or slightly undersized for the compressor's normal startup surge, tripping even when the fridge is working correctly.

Signs: Other appliances on the same circuit also trip occasionally.

Consult an electrician

Frequently Asked Questions

Is it safe to keep resetting the MCB and trying again?

No — repeated tripping is your home's electrical safety system doing its job. Continuing to reset and retry risks further damage or an electrical hazard, and should be inspected rather than repeated.

How is this different from a relay problem post you covered earlier?

Relay issues alone often cause clicking without cooling but don't necessarily trip the MCB. A genuine MCB trip points to an actual current surge, which needs testing to isolate whether it's the compressor, relay, or wiring.

Can this be a wiring issue outside the fridge?

Yes, occasionally — if other appliances on the same circuit also cause tripping, the household wiring or the MCB itself may need an electrician's attention rather than fridge repair.